#! @PERLV_PATH@
##
## $Id$
##
## @PACKAGE@ @VERSION@
## Copyright (c) 1997-2007 by Terrapin Communications, Inc.
## All rights reserved.
##
## This code is derived from software contributed to and maintained by
## Terrapin Communications, Inc. by Henry Kilmer, John Heasley, Andrew Partan,
## Pete Whiting, Austin Schutz, and Andrew Fort.
##
## Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions
## are met:
## 1. Redistributions of source code must retain the above copyright
##    notice, this list of conditions and the following disclaimer.
## 2. Redistributions in binary form must reproduce the above copyright
##    notice, this list of conditions and the following disclaimer in the
##    documentation and/or other materials provided with the distribution.
## 3. All advertising materials mentioning features or use of this software
##    must display the following acknowledgement:
##        This product includes software developed by Terrapin Communications,
##        Inc. and its contributors for RANCID.
## 4. Neither the name of Terrapin Communications, Inc. nor the names of its
##    contributors may be used to endorse or promote products derived from
##    this software without specific prior written permission.
## 5. It is requested that non-binding fixes and modifications be contributed
##    back to Terrapin Communications, Inc.
##
## THIS SOFTWARE IS PROVIDED BY Terrapin Communications, INC. AND CONTRIBUTORS
## ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
## TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
## PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COMPANY OR CONTRIBUTORS
## BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
## CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
## SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
## INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
## CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
## ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
## POSSIBILITY OF SUCH DAMAGE.
# 
# Pretty huge hack to take care of Dell (aka. SMC) Switch configs; started by
# d_pfleger@juniper.net
#
#  RANCID - Really Awesome New Cisco confIg Differ
#
# usage: rancid [-dV] [-l] [-f filename | hostname]
#
use Getopt::Std;
getopts('dflV');
if ($opt_V) {
    print "@PACKAGE@ @VERSION@\n";
    exit(0);
}
$log = $opt_l;
$debug = $opt_d;
$file = $opt_f;
$host = $ARGV[0];
$found_end = 0;
$timeo = 90;				# hlogin timeout in seconds

my(@commandtable, %commands, @commands);# command lists
my($aclsort) = ("ipsort");		# ACL sorting mode
my($filter_commstr);			# SNMP community string filtering
my($filter_pwds);			# password filtering mode

# This routine is used to print out the router configuration
sub ProcessHistory {
    my($new_hist_tag,$new_command,$command_string,@string) = (@_);
    if ((($new_hist_tag ne $hist_tag) || ($new_command ne $command))
	&& defined %history) {
	print eval "$command \%history";
	undef %history;
    }
    if (($new_hist_tag) && ($new_command) && ($command_string)) {
	if ($history{$command_string}) {
	    $history{$command_string} = "$history{$command_string}@string";
	} else {
	    $history{$command_string} = "@string";
	}
    } elsif (($new_hist_tag) && ($new_command)) {
	$history{++$#history} = "@string";
    } else {
	print "@string";
    }
    $hist_tag = $new_hist_tag;
    $command = $new_command;
    1;
}

sub numerically { $a <=> $b; }

# This is a sort routine that will sort numerically on the
# keys of a hash as if it were a normal array.
sub keynsort {
    local(%lines) = @_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort numerically keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routine that will sort on the
# keys of a hash as if it were a normal array.
sub keysort {
    local(%lines) = @_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort keys(%lines)) {
	$sorted_lines[$i] = $lines{$key};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routine that will sort on the
# values of a hash as if it were a normal array.
sub valsort{
    local(%lines) = @_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $key (sort values %lines) {
	$sorted_lines[$i] = $key;
	$i++;
    }
    @sorted_lines;
}

# This is a numerical sort routine (ascending).
sub numsort {
    local(%lines) = @_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $num (sort {$a <=> $b} keys %lines) {
	$sorted_lines[$i] = $lines{$num};
	$i++;
    }
    @sorted_lines;
}

# This is a sort routine that will sort on the
# ip address when the ip address is anywhere in
# the strings.
sub ipsort {
    local(%lines) = @_;
    local($i) = 0;
    local(@sorted_lines);
    foreach $addr (sort sortbyipaddr keys %lines) {
	$sorted_lines[$i] = $lines{$addr};
	$i++;
    }
    @sorted_lines;
}

# These two routines will sort based upon IP addresses
sub ipaddrval {
    my(@a) = ($_[0] =~ m#^(\d+)\.(\d+)\.(\d+)\.(\d+)$#);
    $a[3] + 256 * ($a[2] + 256 * ($a[1] +256 * $a[0]));
}
sub sortbyipaddr {
    &ipaddrval($a) <=> &ipaddrval($b);
}

# This routine parses "dir"
sub Dir {
    print STDERR "    In Dir: $_" if ($debug);

    while (<INPUT>) {
	s/^\s+\015//g;
	tr/\015//d;
	next if /^\s*$/;
	last if(/$prompt/);
	# pager remnants like: ^H^H^H    ^H^H^H content
	s/[\b]+\s*[\b]*//g;

	ProcessHistory("COMMENTS","keysort","D1","! $_");
    }
    return(0);
}


sub ShowVer {
    print STDERR "    In ShowVer: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	next if /^\s*$/;
	last if(/$prompt/);
	# pager remnants like: ^H^H^H    ^H^H^H content
	s/[\b]+\s*[\b]*//g;

	ProcessHistory("COMMENTS","keysort","B1","! $_");
    }
    return(0);
}

sub ShowSys {
    print STDERR "    In ShowSys: $_" if ($debug);

    while (<INPUT>) {
	s/^\s+\015//g;
	tr/\015//d;
	next if /^\s*$/;
	last if(/$prompt/);
	# pager remnants like: ^H^H^H    ^H^H^H content
	s/[\b]+\s*[\b]*//g;

	# Remove Uptime
	/ Up time/ && next;

	/system description: (.*)/i &&
	    ProcessHistory("COMMENTS","keysort","A1", "!Chassis type: $1\n") &&
	    next;

	ProcessHistory("COMMENTS","keysort","C1","! $_");
    }
    return(0);
}

sub ShowVlan {
    print STDERR "    In ShowVlan: $_" if ($debug);

    while (<INPUT>) {
	s/^\s+\015//g;
	tr/\015//d;
	next if /^\s*$/;
	last if(/$prompt/);
	# pager remnants like: ^H^H^H    ^H^H^H content
	s/[\b]+\s*[\b]*//g;

	# Remove Uptime
	/ Up time/ && next;
	ProcessHistory("COMMENTS","keysort","D1","! $_");
    }
    return(0);
}

# This routine processes a "write term" (aka show running-configuration)
sub WriteTerm {
    my($comment) = (0);
    print STDERR "    In ShowRun: $_" if ($debug);

    while (<INPUT>) {
	tr/\015//d;
	next if /^\s*$/;
	last if(/$prompt/);
	# pager remnants like: ^H^H^H    ^H^H^H content
	s/[\b]+\s*[\b]*//g;

	# skip consecutive comment lines
	if (/^!/) {
	    next if ($comment);
	    ProcessHistory("","","",$_);
	    $comment++;
	    next;
	}
	$comment = 0;

	/^building running-config/ && next;
	/^------+/ && ProcessHistory("","","","!$_") && next;
	/^router configuration/i && ProcessHistory("","","","!$_") && next;
	/^oob host config/i && ProcessHistory("","","","!$_") && next;
	/^empty configuration/i && ProcessHistory("","","","!$_") && next;

	if (/^password (\S+) encrypted/ && $filter_pwds > 1) {
	    ProcessHistory("","","","!password <removed> encrypted\n");
	    next;
	}
	if (/^password (\S+)$/ && $filter_pwds >= 1) {
	    ProcessHistory("","","","!password <removed>\n");
	    next;
	}

	if (/^(enable password level \d+) (\S+) encrypted/ && $filter_pwds > 1){
	    ProcessHistory("","","","!$1 <removed> encrypted\n");
	    next;
	}
	if (/^(enable password level \d+) (\S+)$/ && $filter_pwds >= 1) {
	    ProcessHistory("","","","!$1 <removed> $'\n");
	    next;
	}

	# order/prune snmp-server host statements
	# we only prune lines of the form
	# snmp-server host a.b.c.d <community>
	if (/^(snmp-server host) (\d+\.\d+\.\d+\.\d+) (\S+)/) {
	    if ($filter_commstr) {
		ProcessHistory("SNMPSERVERHOST","ipsort",
			       "$2","!$1 $2 <removed>$'");
	    } else {
		ProcessHistory("SNMPSERVERHOST","ipsort","$2","$_");
	    }
	    next;
	}
	if (/^(snmp-server community) (\S+)/) {
	    if ($filter_commstr) {
		ProcessHistory("SNMPSERVERCOMM","keysort",
			       "$_","!$1 <removed>$'") && next;
	    } else {
		ProcessHistory("SNMPSERVERCOMM","keysort","$2","$_") && next;
	    }
	}

	# prune tacacs/radius server keys
	if (/^(tacacs-server|radius-server) key \w+/ && $filter_pwds >= 1) {
	    ProcessHistory("","","","!$1 <removed>$'"); next;
	}

	ProcessHistory("","","","$_");
    }
    $found_end = 1;
    return(1);
}

# dummy function
sub DoNothing {print STDOUT;}

# Main
@commandtable = (
	{'show system'			=> 'ShowSys'},
	{'show version'			=> 'ShowVer'},
	{'dir'				=> 'Dir'},
	{'show vlan'			=> 'ShowVlan'},
	{'show running-config'		=> 'WriteTerm'}
);
# Use an array to preserve the order of the commands and a hash for mapping
# commands to the subroutine and track commands that have been completed.
@commands = map(keys(%$_), @commandtable);
%commands = map(%$_, @commandtable);

$cisco_cmds=join(";",@commands);
$cmds_regexp=join("|",@commands);

if (length($host) == 0) {
    if ($file) {
	print(STDERR "Too few arguments: file name required\n");
	exit(1);
    } else {
	print(STDERR "Too few arguments: host name required\n");
	exit(1);
    }
}
open(OUTPUT,">$host.new") || die "Can't open $host.new for writing: $!\n";
select(OUTPUT);
# make OUTPUT unbuffered if debugging
if ($debug) { $| = 1; }

if ($file) {
    print STDERR "opening file $host\n" if ($debug);
    print STDOUT "opening file $host\n" if ($log);
    open(INPUT,"<$host") || die "open failed for $host: $!\n"; } else {
    print STDERR "executing hlogin -t $timeo -c\"$cisco_cmds\" $host\n" if ($debug);
    print STDOUT "executing hlogin -t $timeo -c\"$cisco_cmds\" $host\n" if ($log);
    if (defined($ENV{NOPIPE})) {
	system "hlogin -t $timeo -c \"$cisco_cmds\" $host </dev/null > $host.raw 2>&1" || die "hlogin failed for $host: $!\n";
	open(INPUT, "< $host.raw") || die "hlogin failed for $host: $!\n";
    } else {
	open(INPUT,"hlogin -t $timeo -c \"$cisco_cmds\" $host </dev/null |") || die "hlogin failed for $host: $!\n";
    }
}

# determine ACL sorting mode
if ($ENV{"ACLSORT"} =~ /no/i) {
    $aclsort = "";
}
# determine community string filtering mode
if (defined($ENV{"NOCOMMSTR"}) &&
    ($ENV{"NOCOMMSTR"} =~ /yes/i || $ENV{"NOCOMMSTR"} =~ /^$/)) {
    $filter_commstr = 1;
} else {
    $filter_commstr = 0;
}
# determine password filtering mode
if ($ENV{"FILTER_PWDS"} =~ /no/i) {
    $filter_pwds = 0;
} elsif ($ENV{"FILTER_PWDS"} =~ /all/i) {
    $filter_pwds = 2;
} else {
    $filter_pwds = 1;
}

ProcessHistory("","","","!RANCID-CONTENT-TYPE: smc\n!\n");
ProcessHistory("COMMENTS","keysort","A0","!\n");
ProcessHistory("COMMENTS","keysort","B0","!\n");
ProcessHistory("COMMENTS","keysort","C0","!\n");
ProcessHistory("COMMENTS","keysort","D0","!\n");
TOP: while(<INPUT>) {
    tr/\015//d;
    if (/^Error:/) {
	print STDOUT ("$host dlogin error: $_");
	print STDERR ("$host dlogin error: $_") if ($debug);
	last;
    }
    while (/#\s*($cmds_regexp)\s*$/) {
	$cmd = $1;
	if (!defined($prompt)) {
	    $prompt = ($_ =~ /^([^#]+#)/)[0];
	    $prompt =~ s/([][}{)(\\])/\\$1/g;
	    print STDERR ("PROMPT MATCH: $prompt\n") if ($debug);
	}
	print STDERR ("HIT COMMAND:$_") if ($debug);
	if (!defined($commands{$cmd})) {
	    print STDERR "$host: found unexpected command - \"$cmd\"\n";
	    last TOP;
	}
	$rval = &{$commands{$cmd}};
	delete($commands{$cmd});
	if ($rval == -1) {
	    last TOP;
	}
    }
}
print STDOUT "Done $logincmd: $_\n" if ($log);
# Flush History
ProcessHistory("","","","");
# Cleanup
close(INPUT);
close(OUTPUT);

if (defined($ENV{NOPIPE})) {
    unlink("$host.raw") if (! $debug);
}

# check for completeness
if (scalar(%commands) || !$found_end) {
    if (scalar(%commands)) {
	printf(STDOUT "$host: missed cmd(s): %s\n", join(',', keys(%commands)));
	printf(STDERR "$host: missed cmd(s): %s\n", join(',', keys(%commands))) if ($debug);
    }
    if (!$found_end) {
	print STDOUT "$found_end: found end\n";
	print STDOUT "$host: End of run not found\n";
	print STDERR "$host: End of run not found\n" if ($debug);
	system("/usr/bin/tail -1 $host.new");
    }
    unlink "$host.new" if (! $debug);
}